Route · IAD → ORD · 2020–2025 BTS data
Washington to Chicago
The IAD–ORD corridor (Washington, DC → Chicago, IL) runs ahead of the national average, served by 3 carriers across roughly 588 miles.
Data updated 2026-06-13
- 82.2%
- On-time
- +3.2 pts
- vs US avg
- 71 min
- Delay when late
- 10,163
- Flights
Cancelled
0.7%
Best Month
Mar 2024 94%
Worst Month
Jul 2025 64%
Distance
588 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 146 | 36 | 0 | 0 | UA |
| Nov 2025 | 151 | 33 | 3 | 0 | UA |
| Oct 2025 | 176 | 48 | 0 | 0 | UA |
| Sep 2025 | 203 | 43 | 0 | 0 | UA |
| Aug 2025 | 196 | 46 | 2 | 2 | UA |
| Jul 2025 | 185 | 66 | 3 | 0 | UA |
| Jun 2025 | 180 | 46 | 0 | 0 | UA |
| May 2025 | 186 | 50 | 0 | 0 | UA |
| Apr 2025 | 180 | 38 | 1 | 0 | UA |
| Mar 2025 | 152 | 25 | 0 | 1 | UA |
| Feb 2025 | 112 | 16 | 0 | 0 | UA |
| Jan 2025 | 124 | 27 | 2 | 1 | UA |
| Dec 2024 | 128 | 25 | 0 | 0 | UA |
| Nov 2024 | 149 | 19 | 1 | 0 | UA |
| Oct 2024 | 155 | 16 | 0 | 0 | UA |
| Sep 2024 | 151 | 12 | 0 | 0 | UA |
| Aug 2024 | 156 | 50 | 2 | 1 | UA |
| Jul 2024 | 154 | 39 | 5 | 1 | UA |
| Jun 2024 | 150 | 33 | 0 | 0 | UA |
| May 2024 | 156 | 37 | 1 | 0 | UA |
| Apr 2024 | 120 | 15 | 0 | 0 | UA |
| Mar 2024 | 126 | 8 | 0 | 0 | UA |
| Feb 2024 | 117 | 10 | 0 | 0 | UA |
| Jan 2024 | 124 | 32 | 4 | 0 | UA |
Cancellation Rate
0.7%
24 of 3,677 flights
Diversion Rate
0.2%
6 of 3,677 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Origin airport →ORD - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
Destination airport →Compare the two airports
See IAD and ORD side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAD–ORD.
Routes with a similar on-time rate
What the Data Says About IAD to ORD
Bureau of Transportation Statistics records show Washington to Chicago (IAD to ORD) running a 82.2% on-time rate over 10,163 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 71.3 minutes. The 588-mile corridor is served by 3 carriers, and over the last 24 months 0.7% of 3,677 flights were cancelled, 0.2% diverted.
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 94% on-time, while Jul 2025 came in at just 64% - a 29-point swing worth factoring into travel timing.
Frequently Asked Questions
How often are flights delayed from IAD to ORD? ▼
What is the cancellation rate for IAD to ORD? ▼
How far is the flight from IAD to ORD? ▼
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Flight Guides
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.